Projecting machine



May 28, 1929. PRQCTQR 1,714,816

' PROJECTING MACHINE Filed Oct. 22, 1925 2 Sheets-Sheet l 6% 1' j 9amvemt oz BARTON/'4. PFwcwR. v 351 his elf 120mm 1 KO May 28, 1929. B.A. PROCTOR PROJECTING MACHINE Filed Oct. 22, 1925 2 Sheets-Sheet 2'awwemtoz BARTON A. PROCTOR.

Patented May 28,- 1929.

UNITED STATES ATENT OFFICE.

BARTON A. PBOCTOR, OF NEW YORK, Y., ASSIGNOB TO THE AUTOIA'I'IO mmTIGER, 1110., OF NEW YORK, N. Y-, A COBPOQATIOH OF DELAWAREPBOJ'EG'I'ING MACHINE.

Application filed October 22, 1925. Berta! Ho. 64,008.

The present invention relates to projecting machines, and is moreparticularly directed toward a projecting machine which is designed toautomatically repeat the exhibition of a picture. The picture is passedthrough the projector to be exhibited, and is then automaticallyre-rolled'so that it may again be exhibited.

The projector is preferably operated by an electric motor which runs allthe time. This motor drives, through suitable gear trains or pulleys, apair of shafts which are placed adjacent to the shafts carrying thereels of fihn, and clutches are provided so that one motor driven shaftmay be connected to the corresponding reel shaft at the same time thatthe other is disconnected. The shifting of these clutches to alternatelydrivingly connect the reel shafts to the motor is a convenient method ofaccomplishing the re-rolling of the film. To insure satisfactoryoperation, it is desirable that this clutching and declutching beaccomplished positively and at the right time.

While there are, various manners in which this re-rolling operation maybe controlled, the present invention relates, more particularly, tocontrolling it in response to the building up or increase in diameter ofthe roll of filmon the reel onto which it is being wound.

As this increase in diameter is very gradual, it is not well suited as aprimary power source for stopping the operation of one reel shaft andinitiating the operation of the other. It is, therefore, preferable toprovide a construction in which the primary power for shifting theclutches, or other devices used, is derlved from another source, and toutilize the device responsive to the building up of the film on the reelas a controlling element which makes this power available at the propertime. In this manner, one is able to provide actuating mechanism forefiectuating the reversal and to control it from the film.

In my copending application, Serial No. 45,963 filed July 25, 1925, Ihave shown and described a form of mechanism controlled in the abovemanner, and wherein the actuating of the clutches is accomplishedmechanically by power derived from the motor. the present application,the specific embodlment to be disclosed contemplates the use ofelectromagnetically controlled devices, energized Other and furtherobjects of the invention will be apparent as the description proceeds.

The accompanying drawings show, for purposes of illustrating theinvention, one of the many possible embodiments in which the inventionmay take form, it being understood that the invention ma be embodied invarious forms, and that the drawings are illustrative of the inventionrather than limiting the same.

In these drawin s:

' Figure 1 is a si e elevation of the projectingrmachine with parts insectionigure 2 is a sectional view talren on the line 22 of Figure 1,the upper part of the machine being shown in elevation Figure 3 is ahorizontal sectional view taken on the line 3-3 of Figure 1; and

Figure 4 is a circuit diagram.

A pair of film reels 10 and 11 are carried on reel shafts 12 and 13which are suitably mounted on a vertical plate 14 so that the film 15may be transferred from one reel to the other. This plate 14 ismounted-on top of a table or platform 15. An electric motor 16 issuitably mounted on the platform 15 behind the plate 14, and this motoris drivingly connected with a worm wheel 17 carried on a shaft 18 inline with the reel shaft 13. This shaft is mounted in bearings in anupright standard 19, and carries a spur car 20, which meshes with apinion 21 carri on a shaft 22, also supported from the standard 19. Thisshaft 22 carries a pulley 23, and a belt 24 drivingly connects thispulley with a pulley 25 carried on a shaft 26. This upper shaft 26 issupported in a bracket 127 so as to be in line with the reel shaft 12.

As here shown, the up r shaft 26 carries a sliding collar 27 provldedwith pins 28, which pass through a flange 29 integral with the shaft 26.When this collar is moved toward the left, the pins 28 are enabled toengage with ins 30 carried on the innerend of the reel s aft 12, so asto drivingly connect the shafts 26 and 12. The shaft 18 is also providedwith a similar sliding collar 31, which has pins 32 passing through theflange 33 and engageable with abutments 34 carried on the lower reelshaft 13. As the step-by-step mechanism for advancing the film forms nopart of the present invention, it is omitted from the drawings. Themechanism which compensates for the varying diameter of the roll of filmon the take-up reel, is indicated generally by the reference character35, and consists essentially in a slip clutch.

It will thus be apparent that the motor 16 may be drivingly connectedwith either of the shafts 12 or 13 so as-to wind the film onto the reelcarried by the driven shaft. The gear trains are so proportioned thatthe film rewinds onto the upper reel more rapidly than it is wound ontothe lower reel when being exhibited.

A convenient mechanism for simultaneously shifting the clutches 27 and31 so as to alternately connect the motor to the shafts, 1s shown in thedrawings. Here the lower collar 31 is connected by a yoke 36 with ahollow vertical shaft 37 which extends down below the platform 15, whilethe upper collar 27 is connected by a similar yoke 38 with a shaft 39,which passes down through the inside of the shaft 37. These shafts aresuitably mounted in bearings 40 and 41 carried by the framework of themachine. The shifting of the clutches may be accomplished by quicklymoving one of these shafts in one angular direction and the other in theopposite direction.

The mechanism for carrying out this clutch shifting operation is, in thepresent drawings, shown in the form of electromagnetic devices which areactuated in response to the building up or increase in diameter of thefilm on the reel onto which it is being wound. A mechanical device forthis Furpose is shown in the application above re erred to.

Fixed contacts 42 and 43 are mounted on the vertical plate 14 adjacenteach of the film contacts to be closed. The closing of one contact isindicated in the lower part of Fi ure 2. It will thus be seen that oneis ab e to close a circuit when the film is completely wound onto eitherthe lower or the upper reel.

tacts are closed, it ispreferab to provide While this circuit controlmay include magnets corresponding with each contactand which remain incircuit as long as the con-- supplemental contacts which are opened whenthe magnets function, thereby preventand 45 of the switches. The fixedcontact 42 is connected by a wire 54 with a magnet coil 55, the otherside of which is connected .by a wire 56 with asupplemental contact 57.The other fixed contact 43 is connected by a wire 58 with magnet coil59,which is connected by a wire60 with another supplemental contact 61. Thearmature 62, for the magnet coils 55 and 59, is-pivoted at 63, and isprovidled with pole pieces opposite the magnet 001 s.

An oscillating switch member 64 is mounte'd so that it can bemoved backand forth between the supplemental contacts 57 and 61. For convenienceit is here shown as being supply lead 52 is connected to the pivots 44 4mountedabout the same pivot as the arma- I ture. This oscillatingcontact is under the control of a spring 65 and its pivot is connectedby wire 66 with the supply lead 53. The armature 62 may be moved backand forth in an obvious manner by the electromagnets, and in the presentembodiment of the invention this swin ing armature is interconnected bya suita le mechanism with the clutch controlling shafts 37 and 39.

As here shown, an arm 67 extends out from the armature. This arm carriesan end of the spring 65 and is provided witha pin 68 which engages in aslot 69 in an arm 70 carried on a vertical shaft 71. These connectionsare such that the shaft may be rocked when either electromagnet coil isenergized. The shaft 71 is provided with a crosshead 72 which isconnected by arms 73 and 74 with cranks 75 and 76 carried in the lowerends of shafts 37 and 39, respectively.

The electromagnetically controlled devices I and supplemental contactsmay be conveniently mounted underneath the platform 15. They may becarried on a U-shaped frame 77 suitably attached to this platform. Theshaft 71 is mounted in bearings 78 and 79, while the armature 62 of theelectromagnet may be mounted on a shaft 63 carried by this underframe.contacts ma be mounted on the other side of the frame 7 as indicated.

As shown in Figures 2 and 4, the contacts The magnets and supplemental43 and 45 have been closed to energize the magnet coil- 59 whichattracts the armature 62 and swings the system of oscillatin levers andshafts to the position which wi 1 cause the motor drive to bedisconnected from the lower shaft and connected to the upper shaft. Whenthe armature is moved into the position, shown in full lines in Figures3 and 4, .the spring 65 will be carried across the cen ,ter 63, abovewhich the supplemental contacts 64 is pivoted, and the contraction ofthis spring will pull the contact 64 away from the supplemental contact61 and against the supplemental contact 57 thereby breaking the circuitof the magnet coil 59 and closing one of the openings in the circuit ofthe magnet coil 55. When the parts are in, the position indicated inFigure 4, both circuits are open; that for the magnet coil 59 beingopened between the contacts 61 and 64, and that for the magnet coilbeing opened between the contacts 42 and 44. When the film winds ontothe upper roll to the predetermined amount it will close contacts 42 and43 and energize magnet coil 55 thereby shifting the armature and all theoscillating parts to the other position. The spring will snap thecontact 64 so as to open the circuit, and assists in providing power tooperate the oscillating parts so as to shift the clutches. It also holdsthe clutches in position after the magnets have been deenergized.

What is claimed is:

1. In a film reversing mechanism, the combination with two horizontalreel shafts, of a pair of clutches each connectible to a reel shaft, twoVertical shafts each connected to one of said clutches, an oscillatingplate pivotally mounted intermediate its free ends, each of said freeends being operatively connected to one of said vertical shafts, anactuating member operatively connected to said oscillating plate wherebyto engage one clutch and simultaneously disengage the other, a movablymounted armature operatively connected with the actuating member, andcoils for operating the armature.

2. In a mechanism for winding and rewinding film reels, means forreversing the direction of winding, said means comprising a pair ofinterconnected clutches for al ternately drivingly connecting the filmreels to a power source, a pivotal pin, an armature pivotally mountedintermediate its free ends on said pin, a connecting arm fixed to saidarmature at its pivotal point, a pair of opposed magnet coilsoperatively associated with the free ends of said armature, operatingconnections between the free end of said connecting arm and saidclutches, a pair of leads connected to a source of electric energy, saidarmature being connected to one of said leads, a pair of circuit makingand breaking devices each of which is connected with one winding reel.

of said magnet coils and the other of said leads and o erable inresponse to film movement for cibsing the circuit when it is desired toreverse the movement of the film, a link pivotally connected to saidpin, a common contact at the free end of said link, a spring connectingsaid link with said connecting arm to swin the free end of said link toeither side 0 said pin, and a coil contact for each coil, the coilsmoving the armature and the armature in turn swinging said spring acrosssaid pin to swing said common contact from one coil contactto the othercoil contact.

3. In a mechanism for winding and rewinding film reels, means forreversing the direction of winding, said means comprising a pair ofinterconnected clutches for alternately drivingly connectin' the filmreels to a power source, a T-shape bracket com posed of a shank andcross piece and pivotally connected at their intersection, the crosspiece of said bracket constituting an armature, a pair of opplosedmagnet coils operably associated with t e free ends of said armature,operating connections between the free end of said shank and saidclutches, a pair of leads connected to a source of electric energy, saidcross piece being connected to one of said leads, a pair of circuitmaking and breaking devices each of which is connected with one of saidmagnet coils and the other of said leads and operable in response tofilm movement for closing the circuit when it is desired to reverse themovement of the film, a link pivotally connected to the intersection ofsaid T-shaped bracket, a common contact at the free end of said link, aspring connecting said link with said shank to swing the free end ofsaid link to either side of said intersection, and a coil contact foreach coil,-

the coils moving the armature from contact with one coil to contact withthe other coil, said armature in turn swinging the said spring acrosssaid intersection to swing said common contact from ond coil contact tothe other coil contact.

4. The combination with a film winding reel and a film rewinding reel,of a motor, a driven shaft for the rewinding reel, a second driven shaftfor the winding reel, a train of gears connecting the second drivenshaft with the motor, a belt and pulley connection connecting the otherdriven shaft with the motor, two main clutches, a slip clutch associatedwith said winding reel, and means for alternately, simultaneouslydisengaging said main clutches from said slip clutch and en gaging saidmain clutches with said rewinding reel and simultaneously engaging saidmain clutches with said slip clutch and disengaging said main clutchesfrom said re- BARTON A. PROCTOR.

